Effect of foliar application of selenium on the content of selected amino acids in potato tubers (Solanum tuberosum L.)

Abstract

Selenium (Se) is an important element associated with the enhancement of antioxidant activity in organisms. Potato is very suitable for fertilisation with Se (biofortification). The experiment was performed to examine the effect of foliar application of Se as sodium selenite (200 or 400 g Se/ha) at the tuberisation stage on a spectrum of amino acids in tubers of varieties. The trends of amino acids were consistent in both years of the study. Application of Se increased the relative content of total essential (EAA) and non-essential (NEAA) amino acids relative to the controls (Karin: EAA 16.81-21.73% and NEAA 14.18-18.63%; Ditta: EAA 4.71-13.00% and NEAA 5.78-6.49%). The increase in the content of phenylalanine (Phe) was particularly significant (up to 48.9%) when also the contents of aspartic acid (Asp), glutamic acid (Glu), threonine (Thr), and tyrosine (Tyr) increased significantly compared with the controls. The results of changes in the content of isoleucine (Ile), leucine (Leu), lysine (Lys), methionine (Met), valine (Val), alanine (Ala), arginine (Arg), proline (Pro), cysteine (Cys), glycine (Gly), histidine (His), and serine (Ser) were also discussed. The highest dose of selenium is shown as a stress factor. Its toxic effects resulted in a change of amino acid contents.

The modified qualities of basil plants by selenium and/or ascorbic acid

“…An increase in salicylic acid, a major phenylpropanoid involved in plant acclimatization to various stressors, has been observed in selenium-treated Arabidopsis (Tamaoki et al, 2008). Rises in phenylalanine contents have been reported in Se-fertilized plants (Munshi et al, 1990;Ježek et al, 2011). The production of phenylpropanoids, mainly derived from phenylalanine and tyrosine, is triggered as one of the defense mechanisms under a variety of biotic and abiotic stressors (Dixon and Paiva, 1995).…”

The changes of contents of selected free amino acids associated with cadmium stress in Noccaea caerulescens and Arabidopsis halleri

“…Amino acids (AA) are the precursors to proteins and also their constituents and they play an important role in metabolism and development (Ježek et al 2011). Plants that were exposed to toxic metals have also been shown to accumulate specific AA, which may have beneficial functions.…”

Composición Fisicoquímica y Propiedades Antioxidantes de Genotipos Nativos de Papa Criolla ( Solanum tuberosum Grupo Phureja)

“…Rodríguez et al (2011), reportaron en genotipos del Grupo Phureja cultivados en Colombia, la heredabilidad del contenido de proteína total en 103 familias F1 de hermanos medios maternos, bajo diferentes métodos estadísticos, entre 28% y 41%, con un incremento de proteína entre 0,55 a 0,79; el alto consumo del tubérculo de papa de la población alto andina, incidirá favorablemente en la ingesta de proteínas en la dieta, aunque la papa no es una fuente abundante en proteínas si aporta la mayoría de aminoácidos esenciales como: isoleucina, leucina, lisina, metionina, fenilalanina, treonina, y valina, (Ježek et al, 2011).…”